Four men were spotted going into a manhole early Thursday morning on Long Island, according to Nassau County police.<\/p>\n
Officers said they got a call at 1:15 a.m. about a manhole cover being removed near the intersection of Wantagh Avenue and Jerusalem Avenue in Wantagh.\u00a0<\/p>\n
The police department responded but found no people or damage.\u00a0<\/p>\n
There have been numerous similar incidents in New York City recently.\u00a0<\/p>\n
Just last week, on Aug. 18, three people were caught on video emerging from a manhole<\/a> across from Madison Square Garden and Penn Station.<\/p>\n Back in May, there were similar incidents in\u00a0Flatbush<\/a>, Williamsburg and Queens. People were seen wearing waders and using headlamps and car lights to guide them.<\/p>\n The city’s Department of Environmental Protection previously said entering the sewer system is illegal and dangerous. Even if the infrastructure is safe, people should not climb down there.<\/p>\n “Sewers can contain numerous hazards, including noxious and potentially deadly gases, unstable surfaces, flooding risks, and confined spaces. For these reasons, members of the public should never enter a pipe, drain, catch basin, manhole, or outfall,” a statement read.<\/p>\n Police sources in the city said the people who are going into manholes may be\u00a0treasure hunters<\/a>\u00a0or urban explorers.\u00a0<\/p>\n \n More from CBS News\n <\/p>\n